Back measuring and shaping attachment for bookbinding machines



Jan. 28, 1930. N. s. WELK 1,744,843

BACK MEASURING AND SHAPING ATTACHMENT FOR BOOKBINDING MACHINES F lled Sept. 22, 1926 2 Sheets-Sheet 1 Illil I iNVENTOR 3 AW wwqhww :rQM I; ATTORNEYS Jan. 28, 1930. N. s. WELK 1,744,848

BACK MEASURING AND SHAPING ATTACHMENT FOR BOOKBINDING MACHINES Filed Sept. 22, 1926 2 Sheets-Sheet 2 INVENTOR Y 4 225mm 41% ATTORNEYS MAM Patented Jan. 28, 1930 UNITED STATES PATENT OFFICE NELsoN s. VWELK,OF ATHENS, oHIo, AssIGNon To THE MCBEE BINDER oo.-,fE ATHENS,

' I oHIof, A CORPORATION on OHIO BACK MEASUEINGQANE sHAPINe'n'TTAcHMENT FOR BOOKBINDING MAcHINEs Application filed. September 22, 1926. Serial N'o; ,136,970.

My'invention relates to the book binding art, and particularly to that class of machines adapted for receiving sheets to be bound, compressing-and perforating them, and bind ing them'into a volume with covers and a back. 1 I

My object is to produce an attachmen adapted to be secured to many of the standard book binding machines'n'ow in use,jsuch attachment to T contain means whereby'the positioning of the pressure bar in the machine will positiona measuring'plate ina crimping device, so that when metalto form a back is placed therein and cr'imped, a back of the propersize to fit'thevolume under construction will be produced. I

The book binding machines adapted to receive my attachment are of the class which employs vertical standards secured to a base, althoughniy invention may be attached to any book binding machine which is provided with the necessary standardstoreceive it.

In the drawings I have illustrated apart of one ofthe standard book binding machines in common use, to which my attachment may be easily and readily secured. I

My invention consists of certain details of construction, hereinafter set forth, pointed out inmy'claims, and illustrated in the accompanying drawings, in which I I l i Fig. 1 isfa front elevation, showing my attachment in position on a binding machine;

Fig. 2 is a sideelevation, showing my attachment in position on a binding machine; and v 'lFig. 3 shows a cross section of my attach 'ment, taken. on lines 3 3 ofFig. 1;

' Fig. 4 is a perspectiveview'offthe sheet metal back; 3 ,1

Figs; 5 and 6 are diagrammatic views showing my operation for bending back the excess metal and producingthe finished back cover, respectively.

Referring to the accompanying drawings, the reference numerals 10 and 11 are used to indicate parallel upright standards in a book binding machine, to which is secured a base 12, to receive the sheets to be bound. Above the base 12 is mounted, for vertical movement, a pressure bar 13, Obviously, the book bincb ing machine is provided with proper means i for positioning the sheets for-drilling and binding, but as such mechanism is not a part of my invention I will not describe the same.

My attachment consists of two parallel spaced plates, 14 and :15, extending'horizontally between the (standards 10 andlll; across the top" (preferably) of themachine, and'between'these plates 14 and15, whichare rigidly secured in position, is a thirdvplate 16, mounted for-vertical movement betweenthe plates 14 and 15. i The plate'161is slotted, as

shown at 17 and 18, to permit:the passage therethrough of bolts, 19 and 20, which secure the movable plate '16between the fixed plates 14 and 15, the slots 17' and :18 and the bolts 19 and 20 permitting limitedaverti'cal move ment of the plate 16. The-upper part ofthe plate 14 is-beveled, as shown; at 21, and immediately above the upper edges'ofthe plates 14'andI15 is' a crimpi'ng'bar 22, mounted'for pivotal movement in bearings 23 and, 24, secured to the machine. I

The'plate is provided, near each end, with downwardly extending forked'contact levers 25 and' 26, each of which is designed toengage the upper surface of levers 27 and28 respectively, each of these being pivotally secured to the supporting means for the plates 14 and 15, one extendinginwardly from each end-of said'plate's'14 and15, said levers 27 and 28 being slotted at their inner ends, as shown at 29 and 30', and'through these slots 29 "and 30 I pass, and secure loosely, the bolt 31, thus providing for loosely joining these levers 27 andl28, but permitting themto move on each other-for alimited distance.

Depending from the bolt 31 (which bolt is by construction located, preferably, centrally below plates 14and 15) isa lever 32, provided 1 with alug 33 designed, at times, to engage in 5 a'V-shaped recess 34 in a lug '35mounted on and secured to thepressure bar 13. The lever 32 is loosely mounted, so that itmayswing upwardly, and on one of the arms I have provided a plate 36 containing a recess '37, properly positioned to receive'thelug 33, thus anchoring the levers 27. and 28in a'definite "determined osi'tion, which in turn positively anddefinite y positions the wea able-plate 16. 5

The operation of my device is as follows: The operator lowers the lever 32, the lug 33 engaging in the recess 34. Upward movement of the pressure bar 13 causes levers 27 and 28 to engage their respective forked contact levers, 25 and 26, the levers 27 and 28 obviously being free to move upwardly and downwardly, the limit of their downward movement being determined by the position of the pressure bar 13 by means of the engagement of the lug 33 in the recess 34 in the lug 35.

In forming the back for the volume under construction, the pressure bar 13 is lowered against the sheets to be bound, and pressure applied thereto, thus definitely fixing the position of said pressure bar 13 at its downward limit of movement. Levers 27 and 28 fall, obviously by gravity, as far downwardly as possible, the limit of their downward move ment being controlled by the engagement of the lug 33 in the V-shaped recess 34. The position of the levers 27 and 28 obviously determines the position of the movable plate 16, so that its upper edge is positioned definitely in the space between plates 14 and 15.

The sheet metal used in forming backs for volumes under construction comes in selective standard sizes, so that metal of one certain size will be utilized in forming backs for books of varying thickness, within a certain range. This metal sheet must first be crimped and shaped so as to form right-angled flanges extending from that portion of the metal which will constitute the back, proper, of the volume. These flanges are utilized for attaching the covers and leaves, the complete operation producing the finished volume.

The positioning of the pressure bar 13 for forming the volume under construction, positions the movable plate between the fixed plates 14 and 15. The metal back is then inserted between the fixed plates until its longitudinal end abuts the end of the movable plate. The shaping bar 22 is then rotated until it is stopped by the metal back it is bending, coming in contact with the beveled edge 21 of the plate 14. This operation folds that part of the metal in the back, which is classed as excess metal, back toward its main body portion, as far as permitted by the plate 14. This end of the metal back is then withdrawn from between the plates 14 and 15, and the other longitudinal end inserted between the plates, and the excess metal bent back in the same way. The parts of the metal folded in this manner are excess parts which are not needed in the formation of the hacks for the book, and this excess metal is then flattened against the main body of the back, as is shown in the drawings. The lever 32 is then elevated, the lug 33 being seated in the recess 37 This positions the levers 27 and 28, definitely, which in turn definitely positions the movable plate 16. The metal back is then again inserted between the plates 14 and 15 until one longitudinal end engages the late 16. The shaping bar is then rotated to end the metal to form a right angular bend therein. The metal back is then withdrawn from between the plates and the other longitudinal edge placed between the plates 14 and 15 until it engages the plate 16, and the shaping bar 22 again rotated to form a right angular turn in the other end of the metal back, these two operations forming a U-shaped metal back, the flanges thereof being used for binding the back to the volume.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States is:

1. A measuring device for book binding machines to receive material to form a back for a book under construction, comprising a pair of parallel spaced lates to receive material to form the bac a movable plate mounted between said parallel plates; a pressure bar to compress the leaves in the machine to be bound into a volume; movable levers pivotally secured to the parallel spaced plates and in frictional engagement wit the end of the movable plate, their other ends being slidingly connected with a depending member, said member adapted to contact with the pressurebar, whereby the ositioning of the pressure bar positions the evers and thereby positions the movable plate.

2. In a book measuring device for binding machines, the combination, with a binding machine, of a movable pressure bar to compress sheets to be bound; a back measuring frame work; a movable late in said frame work; movable levers pivotally secured to the frame and in movable engagement with the pressure bar, said levers also bein in frictional engagement with the movab e plate,-

the construction being such that the positioning of the pressure bar moves the levers and thereby positions the movable plate.

3. In a book measuring device for binding machines, the combinatlon, with a binding machine, of a movable ressure bar to compress sheets to be boun a back measuring frame work; a movable plate in said frame work; movable levers ivotally secured to the frame and in moval le enga ement with the pressure bar, said levers also eing in frictional engagement with the movab e plate, the construction being such that the positioning of the pressure bar moves the levers and thereby positions the movable plate; and means to lock said levers in suspended position.

NELSON S. WELK. 

